Why a Clydesdale? The term actually comes from the Triathlon World, for a male athlete over 200 pounds and/or over 6 feet tall. This was never a derogatory term, though. The Clydesdale is a massive and powerful charger, bred for battle originally; not hauling around a beer wagon, to carry an armored knight into combat. They were the time periods equivalent of the M1 Abrams Tank.....large, fast, and unstoppable.
Why an Athena? Look at Greek art, and the idealized form. The Greek culture portrayed the Goddess Athena as, well......statuesque. To be an Athena, you are not going to be a skinny little stick girl. Athena was the Patroness Goddess of Athens, and was not only the goddess of the gift of wisdom, she was a warrior Goddess, portrayed as a large, well muscled, strong and athletic woman that embodies the ideals of wisdom, knowledge, beauty, and strength. This term also comes from the Tri world, and is given to women over 150 pounds and/or 5'10".